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exis [7]
3 years ago
10

Solve for x: 2 over 5 (x − 2) = 4x

Mathematics
2 answers:
ra1l [238]3 years ago
6 0

Answer:

x = - \frac{2}{9}

Step-by-step explanation:

given the equation

\frac{2}{5}(x - 2) = 4x

multiply both sides by 5 to eliminate the fraction

2(x - 2) = 20x

2x - 4 = 20x ( subtract 2x from both sides )

- 4 = 18x ( divide both sides by 18 )

x = - \frac{4}{18} = - \frac{2}{9}

sp2606 [1]3 years ago
6 0

Answer:

Step-by-step explanation:

2/((5(X-2))=4X

2/(5X-10)=4X

2=4X(5X-10)

2=20X-40

42=20X

X=42/20

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serious [3.7K]

Answer:

I'm going to lay this out in a chart so it's a little easier to see:

F(x) = f(g(x))

x | f (x) | f ' (x) | g (x) | g ' (x)

--------------------------------------

-2 | 8 | 4 |

5 | | 3 | -2 | 6

Remember the chain rule, which says

(f (g (x))) ' = g ' (x) f ' (g (x))

When they ask for F ' (5), they are asking for (f (g (x))) ' when x = 5.

Using the chain rule, that's

F ' (5) = g ' (5) f ' (g (5))

We can simplify using the numbers provided.

F ' (5) = (6) f ' (-2)

F ' (5) = (6) (4)

F ' (5) = 24

I hope that helps!

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3 years ago
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